EP1513220B1 - Patch-Antenne integriert in einer Armbanduhr - Google Patents

Patch-Antenne integriert in einer Armbanduhr Download PDF

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Publication number
EP1513220B1
EP1513220B1 EP03019977.2A EP03019977A EP1513220B1 EP 1513220 B1 EP1513220 B1 EP 1513220B1 EP 03019977 A EP03019977 A EP 03019977A EP 1513220 B1 EP1513220 B1 EP 1513220B1
Authority
EP
European Patent Office
Prior art keywords
wristband
conductive
wristwatch according
attachment means
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03019977.2A
Other languages
English (en)
French (fr)
Other versions
EP1513220A1 (de
Inventor
Arnaud Casagrande
Yves Oesch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Swatch Group Research and Development SA
Original Assignee
Swatch Group Research and Development SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP03019977.2A priority Critical patent/EP1513220B1/de
Priority to US10/922,829 priority patent/US7151496B2/en
Priority to JP2004249937A priority patent/JP4852235B2/ja
Publication of EP1513220A1 publication Critical patent/EP1513220A1/de
Application granted granted Critical
Publication of EP1513220B1 publication Critical patent/EP1513220B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/04—Input or output devices integrated in time-pieces using radio waves
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R60/00—Constructional details
    • G04R60/04—Antennas attached to or integrated in watch bracelets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/273—Adaptation for carrying or wearing by persons or animals

Definitions

  • the present invention relates, in general, the integration of an antenna in a wristwatch, and more particularly, the arrangement in the wristwatch of the ground plane and the radiating element, these two antenna elements.
  • the antenna may be used, in particular, to receive and / or transmit radio signals that are transmitted to a radio module integrated in the watch.
  • the watch 1 is formed of a housing 2 containing the radio receiver 3 and a bracelet 4.
  • the bottom of the housing comprises a first metal part 5 which forms the mass of the receiver 3.
  • the radiating element of the antenna is made by a first metal conductor 6 disposed inside the bracelet 4 and connected to the input of the radio receiver 3.
  • This first conductor 6 is in the form of a sinuous wire between the two side walls of the bracelet 4 whose length is unfolded is close to ⁇ / 4, ⁇ being the wavelength corresponding to the central frequency of the signal to be received.
  • the bracelet antenna may also include a second conductor 7 arranged in the bracelet and connected to the receiver's ground.
  • This conductor 7 may be in the form of a film.
  • Each of the two conductors 6 and 7 is respectively disposed in one of the two strands 8 and 9 of the bracelet 4.
  • This bracelet antenna behaves like a dipole antenna of electric length equal to ⁇ / 2.
  • the bottom 5 of the housing, or the second strand 9 of the bracelet ensures the grounding of the receiver 3.
  • the other strand 8 of the bracelet makes a capacitor sensing the field radial around the arm.
  • the dipole is made, at least in part, by the sinuous structure of the first conductor 6 allowing integration of the tuning inductor of the antenna in the strand itself. It is also possible to use a metal bezel 10, represented only on the Figure 1B , isolated from the bottom 5 of the housing to increase the average effective height of the bracelet antenna.
  • the electrical connection between the conductive elements 6 and 7 arranged in the strands 8 and 9 of the bracelet and the receiver 3 disposed in the housing 2 can be achieved by means of electrical contacts via bars, flexible connections by film or crimped , these elements not being represented on the Figures 1A and 1B .
  • the insulation between the mass of the receiver and the radiating element forming the dipole antenna is provided by the body of the housing 2 necessarily made of an insulating material.
  • such a dipole antenna integrated in the bracelet recommends the use at least for the radiating element of a sinuous conductor 6 of determined unfolded length depending on the desired wavelength corresponding to the central frequency of the signal to receive, which may have, depending on the desired reception frequency, problems of robustness of the antenna structure and therefore reliability of operation over time.
  • a wristwatch including an antenna for a radio receiver integrated in the watch are known from the documents JP2000059241 , FR2701616 , US6278873 and US5646634 .
  • a wristwatch according to the preamble of claim 1 is also known from the document JP2000 59241A .
  • a general object of the present invention is therefore to provide a solution for ensuring a tight connection between the external and internal antenna elements to the middle part of the watch in a simple, inexpensive and reliable way without harming the overall aesthetic, while ensuring that this wristwatch assembly, as well as the antenna that is integrated, is robust.
  • the present invention thus relates to a wristwatch of the aforementioned type whose characteristics are set forth in claim 1.
  • an antenna solution of the patch antenna type is particularly suited to these constraints, such an antenna comprising a ground plane, a dielectric substrate and one or more radiating elements of reduced size compared to that of the ground plane.
  • the term "ground plane” means one or more conductive surface or volume elements connected to one another and serving as ground for the radio frequency module.
  • This dielectric element can be formed by a plastic gasket having a constant permittivity as a function of temperature.
  • the radiating element comprises two conductive surface elements each arranged in a plane substantially parallel to the mean plane defined by the middle and connected together so as to define a radiation cylinder.
  • the two conductive surface elements that can be made by means respectively of the metal bottom of the watch and a metal layer applied to a portion of the non-visible face of the dial so as to be isolated from the middle part, the uncovered portion of the dial being formed by a dielectric material.
  • the bracelet comprises first and second strands, in each of which a flexible conductive plate is overmolded and connected to the middle through the conductive fastening means.
  • One of the aims of the invention is to integrate an antenna into a wristwatch comprising a radio frequency module for receiving and / or transmitting radio signals.
  • a radio frequency module for receiving and / or transmitting radio signals.
  • it is preferably provided to use an antenna comprising the largest possible ground plane.
  • FIG. 2 shows a schematic sectional view of a wristwatch according to a first embodiment of the invention.
  • the watch 21, as shown, comprises in particular a metal case 22, which can be made in one piece or separately with a bezel 23, the middle part 22 defining a mean plane Y of the watch.
  • the watch 21 is closed at the top by means of a window 24 supported by the middle part 22 and sealingly fastened, for example, by driving in a material, for example, made of Hytrel, joining.
  • the watch is closed from below by means of a metal base 25, isolated from the middle part 22 by means of a gasket 43, preferably made of malleable plastic, for example , in Hytrel.
  • An enlarged view of the dotted area is given to the figure 4 .
  • the printed circuit 26 supporting the radiofrequency module 27, the clock circuit 28 to which is fixed the watch movement (not shown) and the dial 29 may have openings 31 through which are visible display means 30 such as, for example, a LCD screen.
  • display means 30 such as, for example, a LCD screen.
  • Other display means, not shown here, can also be provided, in particular, needles driven by the watch movement can be placed between the glass 24 and the dial 29.
  • the reception and / or transmission of electrical signals by the radiofrequency module 27 is effected by means of an antenna, advantageously of the patch type, comprising on the one hand a ground plane, as wide as possible, and on the other hand. on the other hand one or more radiating elements, the ground plane and the radiating element or elements being insulated by means of a dielectric element having a substantially constant permittivity as a function of the temperature.
  • the watch comprises a bracelet 32 formed by first and second strands 33 and 34, represented here in a truncated manner, each of the strands being attached to the middle part 22 by means of conductive fasteners.
  • the attachment means are constituted, for each strand of the bracelet, by two metal horns integral with the middle part 22 between which is arranged a bar 36, also metallic.
  • a flexible conductive plate 37 Inside, at least one strand of the bracelet 32, there is provided to arrange a flexible conductive plate 37, whose end, middle side, makes an electrical contact with the fastening means, for example, by folding this end of the plate 37 around the metal bar 36.
  • the ground plane of the antenna comprises the conductive plate 37, the conductive fastening means 35 and 36 and the metal middle part 22.
  • the two strands 33 and 34 of the bracelet are each provided with a conductive plate 37 for the purpose of maximizing the area of the ground plane of the antenna.
  • the electrical contact between the ground plane and the radiofrequency module 27 is achieved via an annular conductive track printed on the periphery of the printed circuit 26 making contact with an annular shoulder of the middle provided for this purpose and whose detail is given to the figure 4 .
  • the radiating element of the antenna comprises at least one conductive surface element arranged in a plane substantially parallel to the mean plane (Y) defined by the middle part 22 and, according to this first embodiment of the invention, this surface element is constituted by the metal base 25, the latter being electrically connected to the radiofrequency module 27 by any suitable means, for example, by means of a screw or any other electrical contact element 42.
  • the radiating element differs from the first mode presented above, essentially at the level of the structure used to produce the radiating element of the antenna. Indeed, it has been demonstrated in the context of the present invention that the radiating element has better characteristics, in particular reception, with a cylindrical radiating structure. Thus, in order to obtain this radiating cylinder, the radiating element comprises two conductive surface elements, each being arranged in a plane substantially parallel to the mean plane defined by the middle part 22.
  • the two surface elements are constituted, on the one hand, by the metal base 25 and, on the other hand, by a metal layer 38 applied to a part of the non-visible face of the dial 29, so as not to contact the middle part 22, the uncoated portion of the dial being formed by a dielectric material insulating the middle of this metal layer 38.
  • An example of deposition of this metal layer 38 on the dial 29 is given to the figure 5 .
  • the electrical contact between the two surface elements forming the radiating cylinder can be achieved by any suitable electrical contact element 45, such as for example a screw, isolated from the ground plane.
  • FIG 4 shows, by way of example, an enlarged view of the dashed areas of Figures 2 and 3 , showing the connections between the radiofrequency module 27 and the antenna elements, and the insulation of these elements together, according to the first and second embodiments of the invention described above.
  • the metal middle part 22 is an element of the ground plane and the metal base 25 corresponds to the radiating element or only to a part of the latter.
  • the electrical connections of these antenna elements with the radiofrequency module 27 are as follows.
  • the middle part 22 has a shoulder 40 against which the printed circuit board 26 supporting the radiofrequency module 27 comes to rest.
  • a conductive track 41 is deposited at the level of the support zone, that is to say say, on the periphery of the printed circuit 26. Concerning the bottom 25, it can be provided to make the electrical contact, by means of a suitable contact element 42.
  • this element 43 not only isolates the ground plane of the radiating element, but also to seal the inside of the watch.
  • this dielectric element 43 is a malleable plastic seal having a substantially constant permittivity as a function of temperature.
  • the figure 5 shows a bottom view of the dial 29 of the watch 21 according to the second embodiment of the invention.
  • fixing means 46 for example screws
  • This element 45 is arranged on the metal layer 38 in order to make the electrical contact between this layer and the radiofrequency module.
  • the metal layer 38 may be of any shape, but it preferably covers the largest area available.
  • the insulation between the middle and the metal layer is formed by a peripheral zone 47 not covered by the metal layer 38, this zone 47 being preferably made of a dielectric material with a substantially constant permittivity as a function of temperature.
  • the conductive fastener means used for electrically contacting the conductive parts of the wristband with the middle part of the metal it is intended to use in each of the strands a flexible conductive plate 37 whose end , middle side, forms the metal bar 36, the two elements 36 and 37 being a single piece.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Claims (8)

  1. Armbanduhr (21), umfassend ein Gehäuse mit einem Mittelteil (22, 44), der eine Mittelebene (Y) definiert, Einrichtungen (35, 36) zum Befestigen des Armbands (32) an dem Mittelteil und ein Radiofrequenzmodul (27), das in dem Mittelteil angeordnet ist und einerseits mit einer Masseebene und andererseits mit einem Strahlungselement, die voneinander isoliert sind und eine Antenne bilden, verbunden ist, wobei die Masseebene den Mittelteil, der leitend ist, umfasst, und dieser Letztere von innen mit dem Radiofrequenzmodul verbunden ist, wobei das Strahlungselement ein erstes Oberflächenleiterelement (25) aufweist, das in einer Ebene angeordnet ist, die zu der durch den Mittelteil definierten Mittelebene im Wesentlichen parallel ist, dadurch gekennzeichnet, dass die Masseebene ferner mindestens einen Oberflächenleiterabschnitt (37) des Armbandes, der mit den Einrichtungen zum Befestigen des Armbandes verbunden ist, und die Befestigungseinrichtungen (35, 36) umfasst, wobei diese Letzteren leitend sind, und dass das erste Oberflächenleiterelement durch einen metallischen Boden (25) gebildet ist, der von dem Mittelteil durch ein dielektrisches Element (43) isoliert ist.
  2. Armbanduhr nach Anspruch 1, dadurch gekennzeichnet, dass das dielektrische Element durch eine formbare Kunststoffdichtung gebildet ist, die in Abhängigkeit von der Temperatur eine im Wesentlichen konstante Permittivität aufweist.
  3. Armbanduhr nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Strahlungselement ein zweites Oberflächenleiterelement (38) umfasst, das ebenfalls in einer Ebene angeordnet ist, die zu der durch den Mittelteil definierten Mittelebene im Wesentlichen parallel ist, und durch ein Element (45) für elektrischen Kontakt mit dem ersten Oberflächenelement (25) verbunden ist, derart, dass ein Strahlungszylinder definiert wird.
  4. Armbanduhr nach Anspruch 3, die ein Zifferblatt (29) umfasst, das eine erste Fläche, die durch ein Uhrenglas (24) sichtbar ist, und eine zweite nicht sichtbare Fläche gegenüber der ersten Fläche aufweist, dadurch gekennzeichnet, dass das zweite Oberflächenleiterelement durch eine Metallschicht (38) gebildet ist, die auf einen Teil der nicht sichtbaren Fläche des Zifferblatts so aufgebracht ist, dass sie mit dem Mittelteil nicht in Kontakt ist, und dass der nicht bedeckte Teil (47) des Zifferblatts aus einem dielektrischen Material gebildet ist, das den Mittelteil von dem zweiten Oberflächenelement isoliert.
  5. Armbanduhr nach einem der Ansprüche 1 bis 4, wobei das Armband (32) einen ersten (33) und einen zweiten (34) Strang umfasst, dadurch gekennzeichnet, dass der Oberflächenleiterabschnitt durch eine biegsame leitende Platte (37) gebildet ist, die in einen der beiden Stränge des Armbands eingelegt ist und mit dem Mittelteil über die Befestigungseinrichtungen verbunden ist.
  6. Armbanduhr nach Anspruch 5, dadurch gekennzeichnet, dass die Masseebene ferner eine zweite biegsame leitende Platte (37) umfasst, die in den anderen Strang des Armbands eingelegt ist und ebenfalls mit dem Mittelteil über die Befestigungseinrichtungen verbunden ist.
  7. Armbanduhr nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass die Befestigungseinrichtungen für jeden Strang des Armbands zwei metallische Hörner (35) umfassen, die mit dem Mittelteil fest verbunden sind und zwischen denen ein metallischer Steg (36) angeordnet ist, und dass die eine oder die mehreren leitenden Platten um den einen oder die mehreren entsprechenden Stege gebogen sind.
  8. Armbanduhr nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass die Befestigungseinrichtungen für jeden Strang des Armbands zwei metallische Hörner (35) umfassen, die mit dem Mittelteil fest verbunden sind, und dass die eine oder die mehreren leitenden Platten (37) ein starres Ende in Form eines Stegs (36) aufweisen, der mit den Hörnern zusammenwirkt.
EP03019977.2A 2003-09-03 2003-09-03 Patch-Antenne integriert in einer Armbanduhr Expired - Lifetime EP1513220B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP03019977.2A EP1513220B1 (de) 2003-09-03 2003-09-03 Patch-Antenne integriert in einer Armbanduhr
US10/922,829 US7151496B2 (en) 2003-09-03 2004-08-23 Patch antenna integrated in a wristwatch
JP2004249937A JP4852235B2 (ja) 2003-09-03 2004-08-30 腕時計組込パッチアンテナ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03019977.2A EP1513220B1 (de) 2003-09-03 2003-09-03 Patch-Antenne integriert in einer Armbanduhr

Publications (2)

Publication Number Publication Date
EP1513220A1 EP1513220A1 (de) 2005-03-09
EP1513220B1 true EP1513220B1 (de) 2018-10-31

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EP03019977.2A Expired - Lifetime EP1513220B1 (de) 2003-09-03 2003-09-03 Patch-Antenne integriert in einer Armbanduhr

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US (1) US7151496B2 (de)
EP (1) EP1513220B1 (de)
JP (1) JP4852235B2 (de)

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US7215600B1 (en) * 2006-09-12 2007-05-08 Timex Group B.V. Antenna arrangement for an electronic device and an electronic device including same
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US20090289855A1 (en) * 2008-05-23 2009-11-26 Sony Ericsson Mobile Communications Ab Methods and Apparatus for Providing an Integrated Inverted Loop Antenna in a Wireless Device
JP5569668B2 (ja) * 2008-10-20 2014-08-13 セイコーエプソン株式会社 電子腕時計
KR101587092B1 (ko) * 2008-11-04 2016-01-20 엘지전자 주식회사 이동 단말기
JP2011097431A (ja) * 2009-10-30 2011-05-12 Seiko Epson Corp 腕装着型電子機器
JP5712814B2 (ja) 2010-11-12 2015-05-07 セイコーエプソン株式会社 アンテナ内蔵式電子時計
US9571612B2 (en) 2010-11-12 2017-02-14 venyard GmbH Wrist phone with improved voice quality
JP5218630B2 (ja) * 2010-12-28 2013-06-26 カシオ計算機株式会社 電波受信機器、および、電波受信機器の製造方法
JP5994522B2 (ja) * 2012-09-24 2016-09-21 セイコーエプソン株式会社 アンテナ内蔵式電子時計
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US10594025B2 (en) * 2013-03-11 2020-03-17 Suunto Oy Coupled antenna structure and methods
US10734731B2 (en) 2013-03-11 2020-08-04 Suunto Oy Antenna assembly for customizable devices
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JP6456030B2 (ja) * 2014-03-12 2019-01-23 シチズン時計株式会社 電波腕時計
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TWI790344B (zh) 2018-02-08 2023-01-21 芬蘭商順妥公司 槽孔模式天線
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Also Published As

Publication number Publication date
US7151496B2 (en) 2006-12-19
JP4852235B2 (ja) 2012-01-11
EP1513220A1 (de) 2005-03-09
JP2005077414A (ja) 2005-03-24
US20050054321A1 (en) 2005-03-10

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